Multi-Row Header Table - Free UI Component

Primary Header Bg #0f172a

Secondary Header Bg #334155

Header Text Color #ffffff

Row Background #ffffff

Row Hover Fill #f8fafc

Text Color #334155

Border Color #e2e8f0

Vertical Padding (rem) 0.75

Horizontal Padding (rem) 1

Container Width 1000px

Multi-Row Header Table

A complex data table with spanning headers (colspans/rowspans) to represent hierarchical data categories.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Multi-Row Header Table</title>
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap" rel="stylesheet">
    <style>
        /* -- Variables ------------------------------------------------- */
        :root {
            --header-pri-bg: {{headerPrimaryBg}};
            --header-sec-bg: {{headerSecondaryBg}};
            --header-text: {{headerTextColor}};
            --row-bg: {{rowBgColor}};
            --row-hover: {{rowHoverBg}};
            --text-color: {{textColor}};
            --border-color: {{borderColor}};
            --v-pad: {{vPadding}}rem;
            --h-pad: {{hPadding}}rem;
            --table-w: {{tableWidth}};
        }

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
            font-family: 'Inter', sans-serif;
            background-color: #f8fafc;
            color: var(--text-color);
            padding: 3rem 1.5rem;
            display: flex;
            justify-content: center;
        }

/* -- Table Implementation --------------------------------------- */
        .table-container {
            width: 100%;
            max-width: var(--table-w);
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            background: var(--row-bg);
        }

.table-wrapper {
            width: 100%;
            overflow-x: auto;
        }

table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 0.9rem;
        }

/* Multi-Row Header Styling */
        thead th {
            color: var(--header-text);
            font-weight: 600;
            padding: var(--v-pad) var(--h-pad);
            border: 1px solid rgba(255, 255, 255, 0.15); /* Soft inner borders for headers */
        }

/* Hierarchy Colors */
        thead tr:nth-child(1) th {
            background-color: var(--header-pri-bg);
            text-align: center;
        }
        
        thead tr:nth-child(2) th {
            background-color: var(--header-sec-bg);
            font-size: 0.85em;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

/* Reset alignment for first column */
        thead tr th:first-child[rowspan] {
            text-align: left;
            vertical-align: bottom;
        }

tbody td {
            padding: var(--v-pad) var(--h-pad);
            border: 1px solid var(--border-color);
            color: var(--text-color);
        }

tbody tr {
            background-color: var(--row-bg);
            transition: background-color 0.2s ease;
        }

tbody tr:hover {
            background-color: var(--row-hover);
        }

.center { text-align: center; }

</style>
</head>
<body>

<div class="table-container">
        <div class="table-wrapper">
            <table>
                <thead>
                    <tr>
                        <th rowspan="2" style="border-right: 1px solid rgba(255,255,255,0.3);">Platform Tier</th>
                        <th colspan="3" style="border-right: 1px solid rgba(255,255,255,0.3);">Compute Profile</th>
                        <th colspan="2" style="border-right: 1px solid rgba(255,255,255,0.3);">Storage & Networking</th>
                        <th rowspan="2">SLO Guarantee</th>
                    </tr>
                    <tr>
                        <th>vCPUs</th>
                        <th>Memory (GiB)</th>
                        <th>Architecture</th>
                        <th>NVMe SSD</th>
                        <th>Bandwidth</th>
                    </tr>
                </thead>
                <tbody>
                    <tr>
                        <td><strong>Developer Alpha</strong></td>
                        <td class="center">2</td>
                        <td class="center">4.0</td>
                        <td class="center">x86 (Intel)</td>
                        <td class="center">50 GB</td>
                        <td class="center">1 Gbps</td>
                        <td class="center">99.9%</td>
                    </tr>
                    <tr>
                        <td><strong>Developer Beta</strong></td>
                        <td class="center">4</td>
                        <td class="center">8.0</td>
                        <td class="center">x86 (Intel)</td>
                        <td class="center">100 GB</td>
                        <td class="center">2.5 Gbps</td>
                        <td class="center">99.9%</td>
                    </tr>
                    <tr>
                        <td><strong>Compute Pro</strong></td>
                        <td class="center">8</td>
                        <td class="center">16.0</td>
                        <td class="center">ARM (Graviton)</td>
                        <td class="center">250 GB</td>
                        <td class="center">5 Gbps</td>
                        <td class="center">99.99%</td>
                    </tr>
                    <tr>
                        <td><strong>Compute Max</strong></td>
                        <td class="center">16</td>
                        <td class="center">64.0</td>
                        <td class="center">ARM (Graviton)</td>
                        <td class="center">1 TB</td>
                        <td class="center">10 Gbps</td>
                        <td class="center">99.99%</td>
                    </tr>
                    <tr>
                        <td><strong>Data Intelligence</strong></td>
                        <td class="center">32</td>
                        <td class="center">256.0</td>
                        <td class="center">x86 + 1x A100 GPU</td>
                        <td class="center">4 TB</td>
                        <td class="center">25 Gbps</td>
                        <td class="center">99.999%</td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>

</body>
</html>